1390166400 has 384 divisors, whose sum is σ = 5306088960. Its totient is φ = 313344000.

The previous prime is 1390166353. The next prime is 1390166441. The reversal of 1390166400 is 46610931.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9206325 + ... + 9206475.

It is an arithmetic number, because the mean of its divisors is an integer number (13817940).

Almost surely, 2^1390166400 is an apocalyptic number.

1390166400 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 1390166400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2653044480).

1390166400 is an abundant number, since it is smaller than the sum of its proper divisors (3915922560).

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

1390166400 is a wasteful number, since it uses less digits than its factorization.

1390166400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1390166400 is about 37284.9352956392. The cubic root of 1390166400 is about 1116.0635618530.

The spelling of 1390166400 in words is "one billion, three hundred ninety million, one hundred sixty-six thousand, four hundred".