402624261 has 12 divisors (see below), whose sum is σ = 626304588. Its totient is φ = 247768704.

The previous prime is 402624251. The next prime is 402624289. The reversal of 402624261 is 162426204.

It can be written as a sum of positive squares in 2 ways, for example, as 168350625 + 234273636 = 12975^2 + 15306^2 .

It is not a de Polignac number, because 402624261 - 2¹⁸ = 402362117 is a prime.

It is a super-2 number, since 2×402624261² = 324212591091592242, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402624251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1720500 + ... + 1720733.

It is an arithmetic number, because the mean of its divisors is an integer number (52192049).

Almost surely, 2^402624261 is an apocalyptic number.

It is an amenable number.

402624261 is a deficient number, since it is larger than the sum of its proper divisors (223680327).

402624261 is a wasteful number, since it uses less digits than its factorization.

402624261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441252 (or 3441249 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 402624261 is about 20065.4992711370. The cubic root of 402624261 is about 738.4140987979.

The spelling of 402624261 in words is "four hundred two million, six hundred twenty-four thousand, two hundred sixty-one".