402791601 has 16 divisors (see below), whose sum is σ = 548000640. Its totient is φ = 263089920.

The previous prime is 402791593. The next prime is 402791603. The reversal of 402791601 is 106197204.

It is a happy number.

It is not a de Polignac number, because 402791601 - 2³ = 402791593 is a prime.

It is a super-2 number, since 2×402791601² = 324482147672286402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402791603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43945 + ... + 52313.

It is an arithmetic number, because the mean of its divisors is an integer number (34250040).

Almost surely, 2^402791601 is an apocalyptic number.

It is an amenable number.

402791601 is a deficient number, since it is larger than the sum of its proper divisors (145209039).

402791601 is a wasteful number, since it uses less digits than its factorization.

402791601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 402791601 is about 20069.6686818692. The cubic root of 402791601 is about 738.5163853152.

The spelling of 402791601 in words is "four hundred two million, seven hundred ninety-one thousand, six hundred one".