1379474280 has 128 divisors (see below), whose sum is σ = 4676400000. Its totient is φ = 361608192.

The previous prime is 1379474267. The next prime is 1379474297. The reversal of 1379474280 is 824749731.

1379474280 is a `hidden beast` number, since 137 + 94 + 7 + 428 + 0 = 666.

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

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, 52896 + ... + 74544.

It is an arithmetic number, because the mean of its divisors is an integer number (36534375).

Almost surely, 2^1379474280 is an apocalyptic number.

1379474280 is a gapful number since it is divisible by the number (10) 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 1379474280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2338200000).

1379474280 is an abundant number, since it is smaller than the sum of its proper divisors (3296925720).

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

1379474280 is a wasteful number, since it uses less digits than its factorization.

1379474280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21728 (or 21718 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1379474280 is about 37141.2746146386. The cubic root of 1379474280 is about 1113.1948859918.

The spelling of 1379474280 in words is "one billion, three hundred seventy-nine million, four hundred seventy-four thousand, two hundred eighty".