1390438374 has 36 divisors (see below), whose sum is σ = 3013818948. Its totient is φ = 427461840.

The previous prime is 1390438339. The next prime is 1390438391. The reversal of 1390438374 is 4738340931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1186809 + ... + 1187979.

It is an arithmetic number, because the mean of its divisors is an integer number (83717193).

Almost surely, 2^1390438374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390438374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506909474).

1390438374 is an abundant number, since it is smaller than the sum of its proper divisors (1623380574).

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

1390438374 is an equidigital number, since it uses as much as digits as its factorization.

1390438374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 1390438374 is about 37288.5823543883. The cubic root of 1390438374 is about 1116.1363398260.

The spelling of 1390438374 in words is "one billion, three hundred ninety million, four hundred thirty-eight thousand, three hundred seventy-four".