1390429872 has 120 divisors (see below), whose sum is σ = 4261966800. Its totient is φ = 420539904.

The previous prime is 1390429867. The next prime is 1390429877. The reversal of 1390429872 is 2789240931.

It is an interprime number because it is at equal distance from previous prime (1390429867) and next prime (1390429877).

It is not an unprimeable number, because it can be changed into a prime (1390429877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104154 + ... + 116742.

It is an arithmetic number, because the mean of its divisors is an integer number (35516390).

Almost surely, 2^1390429872 is an apocalyptic number.

1390429872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390429872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130983400).

1390429872 is an abundant number, since it is smaller than the sum of its proper divisors (2871536928).

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

1390429872 is a wasteful number, since it uses less digits than its factorization.

1390429872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12675 (or 12666 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1390429872 is about 37288.4683514890. The cubic root of 1390429872 is about 1116.1340649055.

The spelling of 1390429872 in words is "one billion, three hundred ninety million, four hundred twenty-nine thousand, eight hundred seventy-two".