1390667400 has 192 divisors, whose sum is σ = 4998787200. Its totient is φ = 354689280.

The previous prime is 1390667393. The next prime is 1390667401. The reversal of 1390667400 is 47660931.

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

It is not an unprimeable number, because it can be changed into a prime (1390667401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118602 + ... + 129798.

It is an arithmetic number, because the mean of its divisors is an integer number (26035350).

Almost surely, 2^1390667400 is an apocalyptic number.

1390667400 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 1390667400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499393600).

1390667400 is an abundant number, since it is smaller than the sum of its proper divisors (3608119800).

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

1390667400 is a wasteful number, since it uses less digits than its factorization.

1390667400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245 (or 11230 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1390667400 is about 37291.6532215991. The cubic root of 1390667400 is about 1116.1976179122.

The spelling of 1390667400 in words is "one billion, three hundred ninety million, six hundred sixty-seven thousand, four hundred".