402881787 has 48 divisors (see below), whose sum is σ = 736449792. Its totient is φ = 206141760.

The previous prime is 402881753. The next prime is 402881803. The reversal of 402881787 is 787188204.

It is not a de Polignac number, because 402881787 - 2¹⁴ = 402865403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402881747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42093 + ... + 50769.

It is an arithmetic number, because the mean of its divisors is an integer number (15342704).

Almost surely, 2^402881787 is an apocalyptic number.

402881787 is a deficient number, since it is larger than the sum of its proper divisors (333568005).

402881787 is a wasteful number, since it uses less digits than its factorization.

402881787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8768 (or 8765 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 402881787 is about 20071.9153794549. The cubic root of 402881787 is about 738.5714997286.

The spelling of 402881787 in words is "four hundred two million, eight hundred eighty-one thousand, seven hundred eighty-seven".