7491732840 has 48 divisors (see below), whose sum is σ = 24348132900. Its totient is φ = 1997795328.

The previous prime is 7491732827. The next prime is 7491732863. The reversal of 7491732840 is 482371947.

It can be written as a sum of positive squares in 2 ways, for example, as 7237585476 + 254147364 = 85074^2 + 15942^2 .

It is a super-2 number, since 2×7491732840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 10404825 + ... + 10405544.

Almost surely, 2^7491732840 is an apocalyptic number.

It is an amenable number.

7491732840 is an abundant number, since it is smaller than the sum of its proper divisors (16856400060).

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

7491732840 is a wasteful number, since it uses less digits than its factorization.

7491732840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20810386 (or 20810379 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 7491732840 is about 86554.7967474940. The cubic root of 7491732840 is about 1956.7143375567.

The spelling of 7491732840 in words is "seven billion, four hundred ninety-one million, seven hundred thirty-two thousand, eight hundred forty".