1390374684 has 18 divisors (see below), whose sum is σ = 3514558320. Its totient is φ = 463458216.

The previous prime is 1390374683. The next prime is 1390374697. The reversal of 1390374684 is 4864730931.

It is a tau number, because it is divible by the number of its divisors (18).

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390374683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19310724 + ... + 19310795.

It is an arithmetic number, because the mean of its divisors is an integer number (195253240).

Almost surely, 2^1390374684 is an apocalyptic number.

It is an amenable number.

1390374684 is an abundant number, since it is smaller than the sum of its proper divisors (2124183636).

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

1390374684 is a wasteful number, since it uses less digits than its factorization.

1390374684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38621529 (or 38621524 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1390374684 is about 37287.7283298406. The cubic root of 1390374684 is about 1116.1192977645.

The spelling of 1390374684 in words is "one billion, three hundred ninety million, three hundred seventy-four thousand, six hundred eighty-four".