1387090080 has 144 divisors (see below), whose sum is σ = 4800466944. Its totient is φ = 364654080.

The previous prime is 1387090069. The next prime is 1387090091. The reversal of 1387090080 is 800907831.

It is an interprime number because it is at equal distance from previous prime (1387090069) and next prime (1387090091).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 95457 + ... + 109023.

It is an arithmetic number, because the mean of its divisors is an integer number (33336576).

Almost surely, 2^1387090080 is an apocalyptic number.

1387090080 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 1387090080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2400233472).

1387090080 is an abundant number, since it is smaller than the sum of its proper divisors (3413376864).

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

1387090080 is a wasteful number, since it uses less digits than its factorization.

1387090080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659 (or 13648 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1387090080 is about 37243.6582521105. The cubic root of 1387090080 is about 1115.2397025991.

The spelling of 1387090080 in words is "one billion, three hundred eighty-seven million, ninety thousand, eighty".