749109640 has 64 divisors (see below), whose sum is σ = 1719429120. Its totient is φ = 293664000.

The previous prime is 749109631. The next prime is 749109653. The reversal of 749109640 is 46901947.

It is a happy number.

It is a super-2 number, since 2×749109640² = 1122330505481859200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 749109593 and 749109602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541750 + ... + 543130.

It is an arithmetic number, because the mean of its divisors is an integer number (26866080).

Almost surely, 2^749109640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 749109640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859714560).

749109640 is an abundant number, since it is smaller than the sum of its proper divisors (970319480).

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

749109640 is a wasteful number, since it uses less digits than its factorization.

749109640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 749109640 is about 27369.8673727148. The cubic root of 749109640 is about 908.2006226075.

The spelling of 749109640 in words is "seven hundred forty-nine million, one hundred nine thousand, six hundred forty".