77252450 has 54 divisors (see below), whose sum is σ = 159349827. Its totient is φ = 27843200.

The previous prime is 77252419. The next prime is 77252453. The reversal of 77252450 is 5425277.

It can be written as a sum of positive squares in 5 ways, for example, as 5929 + 77246521 = 77^2 + 8789^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6215.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77252453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 683594 + ... + 683706.

Almost surely, 2^77252450 is an apocalyptic number.

77252450 is an abundant number, since it is smaller than the sum of its proper divisors (82097377).

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

77252450 is a wasteful number, since it uses less digits than its factorization.

77252450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 77252450 is about 8789.3372901488. The cubic root of 77252450 is about 425.8965158203.

Multiplying 77252450 by its sum of digits (32), we get a square (2472078400 = 49720²).

The spelling of 77252450 in words is "seventy-seven million, two hundred fifty-two thousand, four hundred fifty".