7491864 has 16 divisors (see below), whose sum is σ = 18729720. Its totient is φ = 2497280.

The previous prime is 7491853. The next prime is 7491893. The reversal of 7491864 is 4681947.

It is a happy number.

It is a super-2 number, since 2×7491864² = 112256052388992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156057 + ... + 156104.

Almost surely, 2^7491864 is an apocalyptic number.

It is an amenable number.

7491864 is an abundant number, since it is smaller than the sum of its proper divisors (11237856).

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

7491864 is a wasteful number, since it uses less digits than its factorization.

7491864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312170 (or 312166 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 7491864 is about 2737.1269608844. The cubic root of 7491864 is about 195.6725756417.

The spelling of 7491864 in words is "seven million, four hundred ninety-one thousand, eight hundred sixty-four".