1878140790 has 128 divisors (see below), whose sum is σ = 5322049920. Its totient is φ = 469684224.

The previous prime is 1878140779. The next prime is 1878140791. The reversal of 1878140790 is 970418781.

1878140790 is a `hidden beast` number, since 1 + 87 + 81 + 407 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878140791) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1711522 + ... + 1712618.

It is an arithmetic number, because the mean of its divisors is an integer number (41578515).

Almost surely, 2^1878140790 is an apocalyptic number.

1878140790 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 1878140790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2661024960).

1878140790 is an abundant number, since it is smaller than the sum of its proper divisors (3443909130).

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

1878140790 is a wasteful number, since it uses less digits than its factorization.

1878140790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 1878140790 is about 43337.5217334817. The cubic root of 1878140790 is about 1233.7941734537.

The spelling of 1878140790 in words is "one billion, eight hundred seventy-eight million, one hundred forty thousand, seven hundred ninety".