749638 has 4 divisors (see below), whose sum is σ = 1124460. Its totient is φ = 374818.

The previous prime is 749587. The next prime is 749641. The reversal of 749638 is 836947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836947 = 23 ⋅36389.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 749597 and 749606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187408 + ... + 187411.

It is an arithmetic number, because the mean of its divisors is an integer number (281115).

2⁷⁴⁹⁶³⁸ is an apocalyptic number.

749638 is a deficient number, since it is larger than the sum of its proper divisors (374822).

749638 is a wasteful number, since it uses less digits than its factorization.

749638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374821.

The product of its digits is 36288, while the sum is 37.

The square root of 749638 is about 865.8163777615. The cubic root of 749638 is about 90.8414095635.

The spelling of 749638 in words is "seven hundred forty-nine thousand, six hundred thirty-eight".