400145884 has 12 divisors (see below), whose sum is σ = 700623000. Its totient is φ = 199967888.

The previous prime is 400145873. The next prime is 400145891. The reversal of 400145884 is 488541004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17359 + ... + 33190.

It is an arithmetic number, because the mean of its divisors is an integer number (58385250).

Almost surely, 2^400145884 is an apocalyptic number.

It is an amenable number.

400145884 is a deficient number, since it is larger than the sum of its proper divisors (300477116).

400145884 is a wasteful number, since it uses less digits than its factorization.

400145884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52532 (or 52530 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 400145884 is about 20003.6467675272. The cubic root of 400145884 is about 736.8958623827.

Adding to 400145884 its reverse (488541004), we get a palindrome (888686888).

The spelling of 400145884 in words is "four hundred million, one hundred forty-five thousand, eight hundred eighty-four".