1390041810 has 80 divisors (see below), whose sum is σ = 3751064856. Its totient is φ = 369349632.

The previous prime is 1390041799. The next prime is 1390041817. The reversal of 1390041810 is 181400931.

It can be written as a sum of positive squares in 4 ways, for example, as 1379602449 + 10439361 = 37143^2 + 3231^2 .

It is a super-2 number, since 2×1390041810² = 3864432467096152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1390041817) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 234402 + ... + 240258.

Almost surely, 2^1390041810 is an apocalyptic number.

1390041810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390041810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875532428).

1390041810 is an abundant number, since it is smaller than the sum of its proper divisors (2361023046).

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

1390041810 is a wasteful number, since it uses less digits than its factorization.

1390041810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169 (or 6160 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1390041810 is about 37283.2644761695. The cubic root of 1390041810 is about 1116.0302194384.

The spelling of 1390041810 in words is "one billion, three hundred ninety million, forty-one thousand, eight hundred ten".