400077156 has 48 divisors (see below), whose sum is σ = 967559040. Its totient is φ = 128666272.

The previous prime is 400077137. The next prime is 400077169. The reversal of 400077156 is 651770004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291985 + ... + 293351.

It is an arithmetic number, because the mean of its divisors is an integer number (20157480).

Almost surely, 2^400077156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400077156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483779520).

400077156 is an abundant number, since it is smaller than the sum of its proper divisors (567481884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400077156 is a wasteful number, since it uses less digits than its factorization.

400077156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 400077156 is about 20001.9288069926. The cubic root of 400077156 is about 736.8536708715.

The spelling of 400077156 in words is "four hundred million, seventy-seven thousand, one hundred fifty-six".