1372136778 has 12 divisors (see below), whose sum is σ = 2972963058. Its totient is φ = 457378920.

The previous prime is 1372136761. The next prime is 1372136803. The reversal of 1372136778 is 8776312731.

It can be written as a sum of positive squares in only one way, i.e., 824436369 + 547700409 = 28713^2 + 23403^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38114893 + ... + 38114928.

Almost surely, 2^1372136778 is an apocalyptic number.

1372136778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1372136778 is an abundant number, since it is smaller than the sum of its proper divisors (1600826280).

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

1372136778 is a wasteful number, since it uses less digits than its factorization.

1372136778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76229829 (or 76229826 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 1372136778 is about 37042.3646383435. The cubic root of 1372136778 is about 1111.2176605829.

The spelling of 1372136778 in words is "one billion, three hundred seventy-two million, one hundred thirty-six thousand, seven hundred seventy-eight".