402554881 has 8 divisors (see below), whose sum is σ = 424670400. Its totient is φ = 380532240.

The previous prime is 402554879. The next prime is 402554891. The reversal of 402554881 is 188455204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402554881 - 2¹ = 402554879 is a prime.

It is a super-2 number, since 2×402554881² = 324100864433848322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402554881.

It is not an unprimeable number, because it can be changed into a prime (402554891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14221 + ... + 31738.

It is an arithmetic number, because the mean of its divisors is an integer number (53083800).

It is a Proth number, since it is equal to 12285 ⋅ 2¹⁵ + 1 and 12285 < 2¹⁵.

Almost surely, 2^402554881 is an apocalyptic number.

It is an amenable number.

402554881 is a deficient number, since it is larger than the sum of its proper divisors (22115519).

402554881 is a wasteful number, since it uses less digits than its factorization.

402554881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46439.

The product of its (nonzero) digits is 51200, while the sum is 37.

The square root of 402554881 is about 20063.7703585343. The cubic root of 402554881 is about 738.3716819856.

The spelling of 402554881 in words is "four hundred two million, five hundred fifty-four thousand, eight hundred eighty-one".