400398027 has 8 divisors (see below), whose sum is σ = 536196240. Its totient is φ = 265765920.

The previous prime is 400398023. The next prime is 400398049. The reversal of 400398027 is 720893004.

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

It is not a de Polignac number, because 400398027 - 2² = 400398023 is a prime.

It is a super-3 number, since 3×400398027³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (400398023) 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 7 ways as a sum of consecutive naturals, for example, 290724 + ... + 292097.

It is an arithmetic number, because the mean of its divisors is an integer number (67024530).

Almost surely, 2^400398027 is an apocalyptic number.

400398027 is a deficient number, since it is larger than the sum of its proper divisors (135798213).

400398027 is a wasteful number, since it uses less digits than its factorization.

400398027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583053.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 400398027 is about 20009.9482008325. The cubic root of 400398027 is about 737.0506093787.

The spelling of 400398027 in words is "four hundred million, three hundred ninety-eight thousand, twenty-seven".