1390228972 has 24 divisors (see below), whose sum is σ = 2725808400. Its totient is φ = 614842560.

The previous prime is 1390228969. The next prime is 1390228981. The reversal of 1390228972 is 2798220931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425347 + ... + 428602.

It is an arithmetic number, because the mean of its divisors is an integer number (113575350).

Almost surely, 2^1390228972 is an apocalyptic number.

It is an amenable number.

1390228972 is a deficient number, since it is larger than the sum of its proper divisors (1335579428).

1390228972 is a wasteful number, since it uses less digits than its factorization.

1390228972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854001 (or 853999 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1390228972 is about 37285.7743918508. The cubic root of 1390228972 is about 1116.0803064387.

The spelling of 1390228972 in words is "one billion, three hundred ninety million, two hundred twenty-eight thousand, nine hundred seventy-two".