8401400784 has 80 divisors (see below), whose sum is σ = 27560160640. Its totient is φ = 2400399360.

The previous prime is 8401400773. The next prime is 8401400797. The reversal of 8401400784 is 4870041048.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1386097 + ... + 1392144.

It is an arithmetic number, because the mean of its divisors is an integer number (344502008).

Almost surely, 2^8401400784 is an apocalyptic number.

8401400784 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8401400784 is an abundant number, since it is smaller than the sum of its proper divisors (19158759856).

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

8401400784 is a wasteful number, since it uses less digits than its factorization.

8401400784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778265 (or 2778253 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 8401400784 is about 91659.1554837813. The cubic root of 8401400784 is about 2032.9057035202.

The spelling of 8401400784 in words is "eight billion, four hundred one million, four hundred thousand, seven hundred eighty-four".