7534400840 has 16 divisors (see below), whose sum is σ = 16952401980. Its totient is φ = 3013760320.

The previous prime is 7534400837. The next prime is 7534400843. The reversal of 7534400840 is 480044357.

It is an interprime number because it is at equal distance from previous prime (7534400837) and next prime (7534400843).

It can be written as a sum of positive squares in 2 ways, for example, as 6947889316 + 586511524 = 83354^2 + 24218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7534400840.

It is not an unprimeable number, because it can be changed into a prime (7534400843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94179971 + ... + 94180050.

Almost surely, 2^7534400840 is an apocalyptic number.

It is an amenable number.

7534400840 is an abundant number, since it is smaller than the sum of its proper divisors (9418001140).

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

7534400840 is a wasteful number, since it uses less digits than its factorization.

7534400840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188360032 (or 188360028 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 7534400840 is about 86800.9264927512. The cubic root of 7534400840 is about 1960.4220283779.

The spelling of 7534400840 in words is "seven billion, five hundred thirty-four million, four hundred thousand, eight hundred forty".