1379821590 has 48 divisors (see below), whose sum is σ = 4100043168. Its totient is φ = 315387648.

The previous prime is 1379821577. The next prime is 1379821601. The reversal of 1379821590 is 951289731.

1379821590 is a `hidden beast` number, since 1 + 37 + 9 + 8 + 21 + 590 = 666.

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 Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1094467 + ... + 1095726.

It is an arithmetic number, because the mean of its divisors is an integer number (85417566).

Almost surely, 2^1379821590 is an apocalyptic number.

1379821590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1379821590 is an abundant number, since it is smaller than the sum of its proper divisors (2720221578).

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

1379821590 is a wasteful number, since it uses less digits than its factorization.

1379821590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190213 (or 2190210 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1379821590 is about 37145.9498465176. The cubic root of 1379821590 is about 1113.2883011136.

The spelling of 1379821590 in words is "one billion, three hundred seventy-nine million, eight hundred twenty-one thousand, five hundred ninety".