1389377070 has 32 divisors (see below), whose sum is σ = 3705006240. Its totient is φ = 370500480.

The previous prime is 1389377023. The next prime is 1389377083. The reversal of 1389377070 is 707739831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2572651 + ... + 2573190.

It is an arithmetic number, because the mean of its divisors is an integer number (115781445).

Almost surely, 2^1389377070 is an apocalyptic number.

1389377070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389377070 is an abundant number, since it is smaller than the sum of its proper divisors (2315629170).

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

1389377070 is a wasteful number, since it uses less digits than its factorization.

1389377070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145857 (or 5145851 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 1389377070 is about 37274.3486864627. The cubic root of 1389377070 is about 1115.8522899660.

The spelling of 1389377070 in words is "one billion, three hundred eighty-nine million, three hundred seventy-seven thousand, seventy".