402220257 has 16 divisors (see below), whose sum is σ = 554299392. Its totient is φ = 259166160.

The previous prime is 402220213. The next prime is 402220261. The reversal of 402220257 is 752022204.

It is not a de Polignac number, because 402220257 - 2¹² = 402216161 is a prime.

It is a super-2 number, since 2×402220257² = 323562270282292098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402220207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85788 + ... + 90354.

It is an arithmetic number, because the mean of its divisors is an integer number (34643712).

Almost surely, 2^402220257 is an apocalyptic number.

It is an amenable number.

402220257 is a deficient number, since it is larger than the sum of its proper divisors (152079135).

402220257 is a wasteful number, since it uses less digits than its factorization.

402220257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5548.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 402220257 is about 20055.4296139474. The cubic root of 402220257 is about 738.1670346278.

The spelling of 402220257 in words is "four hundred two million, two hundred twenty thousand, two hundred fifty-seven".