1400555040 has 48 divisors (see below), whose sum is σ = 4411749888. Its totient is φ = 373481216.

The previous prime is 1400555027. The next prime is 1400555041. The reversal of 1400555040 is 405550041.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1400555040.

It is not an unprimeable number, because it can be changed into a prime (1400555041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458432 + ... + 1459391.

It is an arithmetic number, because the mean of its divisors is an integer number (91911456).

Almost surely, 2^1400555040 is an apocalyptic number.

1400555040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400555040 is an abundant number, since it is smaller than the sum of its proper divisors (3011194848).

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

1400555040 is a wasteful number, since it uses less digits than its factorization.

1400555040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917841 (or 2917833 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 1400555040 is about 37423.9901667366. The cubic root of 1400555040 is about 1118.8367599559.

The spelling of 1400555040 in words is "one billion, four hundred million, five hundred fifty-five thousand, forty".