749990 has 16 divisors (see below), whose sum is σ = 1387152. Its totient is φ = 291744.

The previous prime is 749971. The next prime is 749993. The reversal of 749990 is 99947.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749993) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 644 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (86697).

2⁷⁴⁹⁹⁹⁰ is an apocalyptic number.

749990 is a deficient number, since it is larger than the sum of its proper divisors (637162).

749990 is a wasteful number, since it uses less digits than its factorization.

749990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 749990 is about 866.0196302625. The cubic root of 749990 is about 90.8556258352.

The spelling of 749990 in words is "seven hundred forty-nine thousand, nine hundred ninety".