749730 has 32 divisors (see below), whose sum is σ = 1831104. Its totient is φ = 196416.

The previous prime is 749729. The next prime is 749741. The reversal of 749730 is 37947.

749730 = 71² + 72² + ... + 137².

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824 + ... + 2196.

It is an arithmetic number, because the mean of its divisors is an integer number (57222).

2⁷⁴⁹⁷³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 749730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915552).

749730 is an abundant number, since it is smaller than the sum of its proper divisors (1081374).

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

749730 is a wasteful number, since it uses less digits than its factorization.

749730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 749730 is about 865.8695051796. The cubic root of 749730 is about 90.8451256095.

Subtracting from 749730 its sum of digits (30), we obtain a triangular number (749700 = T₁₂₂₄).

The spelling of 749730 in words is "seven hundred forty-nine thousand, seven hundred thirty".