1902974634 has 80 divisors (see below), whose sum is σ = 4750897536. Its totient is φ = 564364800.

The previous prime is 1902974629. The next prime is 1902974641. The reversal of 1902974634 is 4364792091.

It is a happy number.

1902974634 is a `hidden beast` number, since 1 + 9 + 0 + 2 + 9 + 7 + 4 + 634 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1902974634.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 72394 + ... + 95114.

Almost surely, 2^1902974634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1902974634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2375448768).

1902974634 is an abundant number, since it is smaller than the sum of its proper divisors (2847922902).

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

1902974634 is a wasteful number, since it uses less digits than its factorization.

1902974634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22793 (or 22784 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1902974634 is about 43623.0974828702. The cubic root of 1902974634 is about 1239.2083556993.

The spelling of 1902974634 in words is "one billion, nine hundred two million, nine hundred seventy-four thousand, six hundred thirty-four".