7507428 has 24 divisors (see below), whose sum is σ = 17945760. Its totient is φ = 2441280.

The previous prime is 7507403. The next prime is 7507429. The reversal of 7507428 is 8247057.

7507428 is digitally balanced in base 4 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×7507428² = 112722950350368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7507429) 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, 7138 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (747740).

Almost surely, 2^7507428 is an apocalyptic number.

It is an amenable number.

7507428 is an abundant number, since it is smaller than the sum of its proper divisors (10438332).

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

7507428 is a wasteful number, since it uses less digits than its factorization.

7507428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15307 (or 15305 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 7507428 is about 2739.9686129589. The cubic root of 7507428 is about 195.8079821517.

The spelling of 7507428 in words is "seven million, five hundred seven thousand, four hundred twenty-eight".