1387626044 has 24 divisors (see below), whose sum is σ = 2776552800. Its totient is φ = 594418176.

The previous prime is 1387626013. The next prime is 1387626047. The reversal of 1387626044 is 4406267831.

It is a junction number, because it is equal to n+sod(n) for n = 1387625992 and 1387626010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387626047) 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, 56132 + ... + 76980.

It is an arithmetic number, because the mean of its divisors is an integer number (115689700).

Almost surely, 2^1387626044 is an apocalyptic number.

1387626044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1387626044 is an abundant number, since it is smaller than the sum of its proper divisors (1388926756).

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

1387626044 is a wasteful number, since it uses less digits than its factorization.

1387626044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23237 (or 23235 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 1387626044 is about 37250.8529298324. The cubic root of 1387626044 is about 1115.3833249374.

The spelling of 1387626044 in words is "one billion, three hundred eighty-seven million, six hundred twenty-six thousand, forty-four".