400055087 has 8 divisors (see below), whose sum is σ = 415712640. Its totient is φ = 384521760.

The previous prime is 400055053. The next prime is 400055099. The reversal of 400055087 is 780550004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400055087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400055027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24464 + ... + 37397.

It is an arithmetic number, because the mean of its divisors is an integer number (51964080).

Almost surely, 2^400055087 is an apocalyptic number.

400055087 is a deficient number, since it is larger than the sum of its proper divisors (15657553).

400055087 is a wasteful number, since it uses less digits than its factorization.

400055087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62113.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 400055087 is about 20001.3771275880. The cubic root of 400055087 is about 736.8401218827.

The spelling of 400055087 in words is "four hundred million, fifty-five thousand, eighty-seven".