1390723488 has 648 divisors, whose sum is σ = 5503365504. Its totient is φ = 329011200.

The previous prime is 1390723463. The next prime is 1390723493. The reversal of 1390723488 is 8843270931.

1390723488 is a `hidden beast` number, since 13 + 90 + 72 + 3 + 488 = 666.

It is a super-2 number, since 2×1390723488² = 3868223640149772288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 44862033 + ... + 44862063.

It is an arithmetic number, because the mean of its divisors is an integer number (8492848).

Almost surely, 2^1390723488 is an apocalyptic number.

1390723488 is a gapful number since it is divisible by the number (18) 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 1390723488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2751682752).

1390723488 is an abundant number, since it is smaller than the sum of its proper divisors (4112642016).

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

1390723488 is a wasteful number, since it uses less digits than its factorization.

1390723488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1390723488 is about 37292.4052321649. The cubic root of 1390723488 is about 1116.2126237649.

The spelling of 1390723488 in words is "one billion, three hundred ninety million, seven hundred twenty-three thousand, four hundred eighty-eight".