749428861 has 8 divisors (see below), whose sum is σ = 763646400. Its totient is φ = 735340320.

The previous prime is 749428853. The next prime is 749428879. The reversal of 749428861 is 168824947.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 749428861 - 2³ = 749428853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749428891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20481 + ... + 43798.

It is an arithmetic number, because the mean of its divisors is an integer number (95455800).

Almost surely, 2^749428861 is an apocalyptic number.

It is an amenable number.

749428861 is a deficient number, since it is larger than the sum of its proper divisors (14217539).

749428861 is a wasteful number, since it uses less digits than its factorization.

749428861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64499.

The product of its digits is 774144, while the sum is 49.

The square root of 749428861 is about 27375.6983655212. The cubic root of 749428861 is about 908.3296093068.

The spelling of 749428861 in words is "seven hundred forty-nine million, four hundred twenty-eight thousand, eight hundred sixty-one".