7749820428 has 48 divisors (see below), whose sum is σ = 20676714240. Its totient is φ = 2213106624.

The previous prime is 7749820427. The next prime is 7749820433. The reversal of 7749820428 is 8240289477.

It is a super-2 number, since 2×7749820428² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7749820427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149983 + ... + 194921.

It is an arithmetic number, because the mean of its divisors is an integer number (430764880).

Almost surely, 2^7749820428 is an apocalyptic number.

It is an amenable number.

7749820428 is an abundant number, since it is smaller than the sum of its proper divisors (12926893812).

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

7749820428 is a wasteful number, since it uses less digits than its factorization.

7749820428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47006 (or 47004 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The square root of 7749820428 is about 88033.0644019621. The cubic root of 7749820428 is about 1978.9305202810.

The spelling of 7749820428 in words is "seven billion, seven hundred forty-nine million, eight hundred twenty thousand, four hundred twenty-eight".