1390185468 has 54 divisors (see below), whose sum is σ = 4087812456. Its totient is φ = 397195344.

The previous prime is 1390185457. The next prime is 1390185469. The reversal of 1390185468 is 8645810931.

1390185468 is a `hidden beast` number, since 1 + 3 + 9 + 0 + 185 + 468 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390185469) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 392280 + ... + 395807.

Almost surely, 2^1390185468 is an apocalyptic number.

1390185468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1390185468 is an abundant number, since it is smaller than the sum of its proper divisors (2697626988).

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

1390185468 is a wasteful number, since it uses less digits than its factorization.

1390185468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788111 (or 788099 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1390185468 is about 37285.1910012541. The cubic root of 1390185468 is about 1116.0686646001.

The spelling of 1390185468 in words is "one billion, three hundred ninety million, one hundred eighty-five thousand, four hundred sixty-eight".