400877877 has 4 divisors (see below), whose sum is σ = 534503840. Its totient is φ = 267251916.

The previous prime is 400877843. The next prime is 400877881. The reversal of 400877877 is 778778004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 400877877 - 2⁷ = 400877749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400877887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66812977 + ... + 66812982.

It is an arithmetic number, because the mean of its divisors is an integer number (133625960).

Almost surely, 2^400877877 is an apocalyptic number.

It is an amenable number.

400877877 is a deficient number, since it is larger than the sum of its proper divisors (133625963).

400877877 is a wasteful number, since it uses less digits than its factorization.

400877877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133625962.

The product of its (nonzero) digits is 614656, while the sum is 48.

The square root of 400877877 is about 20021.9348965079. The cubic root of 400877877 is about 737.3449269663.

The spelling of 400877877 in words is "four hundred million, eight hundred seventy-seven thousand, eight hundred seventy-seven".