1371990340 has 96 divisors (see below), whose sum is σ = 3403540224. Its totient is φ = 454740480.

The previous prime is 1371990331. The next prime is 1371990349. The reversal of 1371990340 is 430991731.

It is an interprime number because it is at equal distance from previous prime (1371990331) and next prime (1371990349).

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 1371990340.

It is not an unprimeable number, because it can be changed into a prime (1371990349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895375 + ... + 896905.

It is an arithmetic number, because the mean of its divisors is an integer number (35453544).

Almost surely, 2^1371990340 is an apocalyptic number.

1371990340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1371990340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701770112).

1371990340 is an abundant number, since it is smaller than the sum of its proper divisors (2031549884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1371990340 is a wasteful number, since it uses less digits than its factorization.

1371990340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1371990340 is about 37040.3879569316. The cubic root of 1371990340 is about 1111.1781284985.

The spelling of 1371990340 in words is "one billion, three hundred seventy-one million, nine hundred ninety thousand, three hundred forty".