398490072 has 32 divisors (see below), whose sum is σ = 997401600. Its totient is φ = 132673184.

The previous prime is 398490049. The next prime is 398490077. The reversal of 398490072 is 270094893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398490077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11929 + ... + 30647.

It is an arithmetic number, because the mean of its divisors is an integer number (31168800).

Almost surely, 2^398490072 is an apocalyptic number.

It is an amenable number.

398490072 is an abundant number, since it is smaller than the sum of its proper divisors (598911528).

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

398490072 is a wasteful number, since it uses less digits than its factorization.

398490072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19615 (or 19611 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 398490072 is about 19962.2161094404. The cubic root of 398490072 is about 735.8780270068.

The spelling of 398490072 in words is "three hundred ninety-eight million, four hundred ninety thousand, seventy-two".