7749090 has 48 divisors (see below), whose sum is σ = 20849400. Its totient is φ = 1994496.

The previous prime is 7749067. The next prime is 7749109. The reversal of 7749090 is 909477.

It can be written as a sum of positive squares in 4 ways, for example, as 3721041 + 4028049 = 1929^2 + 2007^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1126 + ... + 4094.

Almost surely, 2^7749090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7749090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10424700).

7749090 is an abundant number, since it is smaller than the sum of its proper divisors (13100310).

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

7749090 is a wasteful number, since it uses less digits than its factorization.

7749090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011 (or 3008 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 7749090 is about 2783.7187357921. The cubic root of 7749090 is about 197.8868346295.

The spelling of 7749090 in words is "seven million, seven hundred forty-nine thousand, ninety".