1538206972 has 24 divisors (see below), whose sum is σ = 2836727712. Its totient is φ = 728376000.

The previous prime is 1538206909. The next prime is 1538206973. The reversal of 1538206972 is 2796028351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538206973) 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, 73479 + ... + 92062.

It is an arithmetic number, because the mean of its divisors is an integer number (118196988).

Almost surely, 2^1538206972 is an apocalyptic number.

It is an amenable number.

1538206972 is a deficient number, since it is larger than the sum of its proper divisors (1298520740).

1538206972 is a wasteful number, since it uses less digits than its factorization.

1538206972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165669 (or 165667 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1538206972 is about 39219.9817949983. The cubic root of 1538206972 is about 1154.3519967242.

The spelling of 1538206972 in words is "one billion, five hundred thirty-eight million, two hundred six thousand, nine hundred seventy-two".