1400128392 has 192 divisors, whose sum is σ = 4116994560. Its totient is φ = 393984000.

The previous prime is 1400128363. The next prime is 1400128403. The reversal of 1400128392 is 2938210041.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3491392 + ... + 3491792.

It is an arithmetic number, because the mean of its divisors is an integer number (21442680).

Almost surely, 2^1400128392 is an apocalyptic number.

1400128392 is a gapful number since it is divisible by the number (12) 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 1400128392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058497280).

1400128392 is an abundant number, since it is smaller than the sum of its proper divisors (2716866168).

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

1400128392 is a wasteful number, since it uses less digits than its factorization.

1400128392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1400128392 is about 37418.2895386735. The cubic root of 1400128392 is about 1118.7231388243.

The spelling of 1400128392 in words is "one billion, four hundred million, one hundred twenty-eight thousand, three hundred ninety-two".