748056989 has 8 divisors (see below), whose sum is σ = 751832280. Its totient is φ = 744289600.

The previous prime is 748056979. The next prime is 748057007. The reversal of 748056989 is 989650847.

It can be written as a sum of positive squares in 4 ways, for example, as 106296100 + 641760889 = 10310^2 + 25333^2 .

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 748056989 - 2⁴ = 748056973 is a prime.

It is a super-2 number, since 2×748056989² = 1119178517583492242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748056979) 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, 284099 + ... + 286719.

It is an arithmetic number, because the mean of its divisors is an integer number (93979035).

Almost surely, 2^748056989 is an apocalyptic number.

It is an amenable number.

748056989 is a deficient number, since it is larger than the sum of its proper divisors (3775291).

748056989 is a wasteful number, since it uses less digits than its factorization.

748056989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 748056989 is about 27350.6305046154. The cubic root of 748056989 is about 907.7750211591.

The spelling of 748056989 in words is "seven hundred forty-eight million, fifty-six thousand, nine hundred eighty-nine".