1387456420 has 24 divisors (see below), whose sum is σ = 3329895744. Its totient is φ = 475699296.

The previous prime is 1387456417. The next prime is 1387456471. The reversal of 1387456420 is 246547831.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 4955062 + ... + 4955341.

It is an arithmetic number, because the mean of its divisors is an integer number (138745656).

Almost surely, 2^1387456420 is an apocalyptic number.

1387456420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1387456420 is an abundant number, since it is smaller than the sum of its proper divisors (1942439324).

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

1387456420 is a wasteful number, since it uses less digits than its factorization.

1387456420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9910419 (or 9910417 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 1387456420 is about 37248.5760801671. The cubic root of 1387456420 is about 1115.3378747742.

The spelling of 1387456420 in words is "one billion, three hundred eighty-seven million, four hundred fifty-six thousand, four hundred twenty".