1378920472 has 32 divisors (see below), whose sum is σ = 2703559680. Its totient is φ = 658097440.

The previous prime is 1378920469. The next prime is 1378920509. The reversal of 1378920472 is 2740298731.

It is a congruent number.

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, 82713 + ... + 97975.

It is an arithmetic number, because the mean of its divisors is an integer number (84486240).

Almost surely, 2^1378920472 is an apocalyptic number.

It is an amenable number.

1378920472 is a deficient number, since it is larger than the sum of its proper divisors (1324639208).

1378920472 is a wasteful number, since it uses less digits than its factorization.

1378920472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15783 (or 15779 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 1378920472 is about 37133.8184408768. The cubic root of 1378920472 is about 1113.0458971678.

The spelling of 1378920472 in words is "one billion, three hundred seventy-eight million, nine hundred twenty thousand, four hundred seventy-two".