400877 has 4 divisors (see below), whose sum is σ = 424476. Its totient is φ = 377280.

The previous prime is 400871. The next prime is 400903. The reversal of 400877 is 778004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 188356 = 461^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 400877 - 2¹⁰ = 399853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400877.

It is not an unprimeable number, because it can be changed into a prime (400871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11774 + ... + 11807.

It is an arithmetic number, because the mean of its divisors is an integer number (106119).

2⁴⁰⁰⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

400877 is a deficient number, since it is larger than the sum of its proper divisors (23599).

400877 is a wasteful number, since it uses less digits than its factorization.

400877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23598.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 400877 is about 633.1484817955. The cubic root of 400877 is about 73.7344389270.

The spelling of 400877 in words is "four hundred thousand, eight hundred seventy-seven".