1401239790 has 64 divisors (see below), whose sum is σ = 3956454720. Its totient is φ = 351682560.

The previous prime is 1401239789. The next prime is 1401239849. The reversal of 1401239790 is 979321041.

1401239790 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148051 + ... + 157230.

It is an arithmetic number, because the mean of its divisors is an integer number (61819605).

Almost surely, 2^1401239790 is an apocalyptic number.

1401239790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1401239790 is an abundant number, since it is smaller than the sum of its proper divisors (2555214930).

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

1401239790 is a wasteful number, since it uses less digits than its factorization.

1401239790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305314 (or 305308 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1401239790 is about 37433.1375922457. The cubic root of 1401239790 is about 1119.0190683092.

The spelling of 1401239790 in words is "one billion, four hundred one million, two hundred thirty-nine thousand, seven hundred ninety".