400516550 has 24 divisors (see below), whose sum is σ = 851384496. Its totient is φ = 137319840.

The previous prime is 400516541. The next prime is 400516573. The reversal of 400516550 is 55615004.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 571817 + ... + 572516.

It is an arithmetic number, because the mean of its divisors is an integer number (35474354).

Almost surely, 2^400516550 is an apocalyptic number.

400516550 is an abundant number, since it is smaller than the sum of its proper divisors (450867946).

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

400516550 is a wasteful number, since it uses less digits than its factorization.

400516550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144352 (or 1144347 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 400516550 is about 20012.9095835663. The cubic root of 400516550 is about 737.1233277116.

The spelling of 400516550 in words is "four hundred million, five hundred sixteen thousand, five hundred fifty".