400077 has 6 divisors (see below), whose sum is σ = 577902. Its totient is φ = 266712.

The previous prime is 400069. The next prime is 400087. The reversal of 400077 is 770004.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 114921 = 534^2 + 339^2 .

It is not a de Polignac number, because 400077 - 2³ = 400069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22218 + ... + 22235.

It is an arithmetic number, because the mean of its divisors is an integer number (96317).

2⁴⁰⁰⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

400077 is a deficient number, since it is larger than the sum of its proper divisors (177825).

400077 is a wasteful number, since it uses less digits than its factorization.

400077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44459 (or 44456 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 18.

The square root of 400077 is about 632.5164029494. The cubic root of 400077 is about 73.6853575099.

The spelling of 400077 in words is "four hundred thousand, seventy-seven", and thus it is an iban number.