625424778 has 48 divisors (see below), whose sum is σ = 1491890400. Its totient is φ = 187777440.

The previous prime is 625424777. The next prime is 625424803. The reversal of 625424778 is 877424526.

It is a happy number.

625424778 is a `hidden beast` number, since 62 + 542 + 47 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (625424777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7093 + ... + 36071.

It is an arithmetic number, because the mean of its divisors is an integer number (31081050).

Almost surely, 2^625424778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625424778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745945200).

625424778 is an abundant number, since it is smaller than the sum of its proper divisors (866465622).

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

625424778 is a wasteful number, since it uses less digits than its factorization.

625424778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29107 (or 29104 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 625424778 is about 25008.4941169995. The cubic root of 625424778 is about 855.1816255168.

The spelling of 625424778 in words is "six hundred twenty-five million, four hundred twenty-four thousand, seven hundred seventy-eight".