402634157 has 4 divisors (see below), whose sum is σ = 402931356. Its totient is φ = 402336960.

The previous prime is 402634151. The next prime is 402634217. The reversal of 402634157 is 751436204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111112681 + 291521476 = 10541^2 + 17074^2 .

It is a cyclic number.

It is not a de Polignac number, because 402634157 - 2⁶ = 402634093 is a prime.

It is a super-2 number, since 2×402634157² = 324228528766201298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402634151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146558 + ... + 149279.

It is an arithmetic number, because the mean of its divisors is an integer number (100732839).

Almost surely, 2^402634157 is an apocalyptic number.

It is an amenable number.

402634157 is a deficient number, since it is larger than the sum of its proper divisors (297199).

402634157 is a wasteful number, since it uses less digits than its factorization.

402634157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297198.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 402634157 is about 20065.7458620406. The cubic root of 402634157 is about 738.4201485129.

It can be divided in two parts, 4026 and 34157, that added together give a palindrome (38183).

The spelling of 402634157 in words is "four hundred two million, six hundred thirty-four thousand, one hundred fifty-seven".