398154460 has 24 divisors (see below), whose sum is σ = 912136176. Its totient is φ = 144783360.

The previous prime is 398154451. The next prime is 398154509. The reversal of 398154460 is 64451893.

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 7 ways as a sum of consecutive naturals, for example, 904677 + ... + 905116.

It is an arithmetic number, because the mean of its divisors is an integer number (38005674).

Almost surely, 2^398154460 is an apocalyptic number.

It is an amenable number.

398154460 is an abundant number, since it is smaller than the sum of its proper divisors (513981716).

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

398154460 is a wasteful number, since it uses less digits than its factorization.

398154460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809813 (or 1809811 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 398154460 is about 19953.8081578430. The cubic root of 398154460 is about 735.6713812378.

The spelling of 398154460 in words is "three hundred ninety-eight million, one hundred fifty-four thousand, four hundred sixty".