1387173426 has 16 divisors (see below), whose sum is σ = 2821370400. Its totient is φ = 454553888.

The previous prime is 1387173379. The next prime is 1387173449. The reversal of 1387173426 is 6243717831.

It is a super-2 number, since 2×1387173426² = 3848500227601154952, which contains 22 as substring.

It is a Curzon 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, 1958931 + ... + 1959638.

It is an arithmetic number, because the mean of its divisors is an integer number (176335650).

Almost surely, 2^1387173426 is an apocalyptic number.

1387173426 is an abundant number, since it is smaller than the sum of its proper divisors (1434196974).

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

1387173426 is a wasteful number, since it uses less digits than its factorization.

1387173426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918633.

The product of its digits is 169344, while the sum is 42.

The square root of 1387173426 is about 37244.7771640535. Note that the first 3 decimals coincide. The cubic root of 1387173426 is about 1115.2620392659.

The spelling of 1387173426 in words is "one billion, three hundred eighty-seven million, one hundred seventy-three thousand, four hundred twenty-six".