400554490 has 64 divisors (see below), whose sum is σ = 843125760. Its totient is φ = 134184960.

The previous prime is 400554457. The next prime is 400554491. The reversal of 400554490 is 94455004.

It is not an unprimeable number, because it can be changed into a prime (400554491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624570 + ... + 625210.

It is an arithmetic number, because the mean of its divisors is an integer number (13173840).

Almost surely, 2^400554490 is an apocalyptic number.

400554490 is an abundant number, since it is smaller than the sum of its proper divisors (442571270).

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

400554490 is a wasteful number, since it uses less digits than its factorization.

400554490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 400554490 is about 20013.8574492775. The cubic root of 400554490 is about 737.1466023021.

The spelling of 400554490 in words is "four hundred million, five hundred fifty-four thousand, four hundred ninety".