1389974094 has 160 divisors (see below), whose sum is σ = 3469188096. Its totient is φ = 415704960.

The previous prime is 1389974023. The next prime is 1389974107. The reversal of 1389974094 is 4904799831.

It is a super-2 number, since 2×1389974094² = 3864055963982241672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) 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 (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1389974094.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20745849 + ... + 20745915.

Almost surely, 2^1389974094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389974094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734594048).

1389974094 is an abundant number, since it is smaller than the sum of its proper divisors (2079214002).

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

1389974094 is an frugal number, since it uses more digits than its factorization.

1389974094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1389974094 is about 37282.3563364764. The cubic root of 1389974094 is about 1116.0120966431.

The spelling of 1389974094 in words is "one billion, three hundred eighty-nine million, nine hundred seventy-four thousand, ninety-four".