1378831072 has 24 divisors (see below), whose sum is σ = 2734111800. Its totient is φ = 684453504.

The previous prime is 1378831067. The next prime is 1378831079. The reversal of 1378831072 is 2701388731.

It is a super-2 number, since 2×1378831072² = 3802350250225338368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378831079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150547 + ... + 159442.

It is an arithmetic number, because the mean of its divisors is an integer number (113921325).

Almost surely, 2^1378831072 is an apocalyptic number.

It is an amenable number.

1378831072 is a deficient number, since it is larger than the sum of its proper divisors (1355280728).

1378831072 is a wasteful number, since it uses less digits than its factorization.

1378831072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310138 (or 310130 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1378831072 is about 37132.6146668936. The cubic root of 1378831072 is about 1113.0218424923.

The spelling of 1378831072 in words is "one billion, three hundred seventy-eight million, eight hundred thirty-one thousand, seventy-two".