1625087772 has 144 divisors (see below), whose sum is σ = 5311418112. Its totient is φ = 422081280.

The previous prime is 1625087771. The next prime is 1625087801. The reversal of 1625087772 is 2777805261.

1625087772 is a `hidden beast` number, since 1 + 6 + 2 + 508 + 77 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625087771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63988 + ... + 85700.

It is an arithmetic number, because the mean of its divisors is an integer number (36884848).

Almost surely, 2^1625087772 is an apocalyptic number.

1625087772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625087772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2655709056).

1625087772 is an abundant number, since it is smaller than the sum of its proper divisors (3686330340).

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

1625087772 is a wasteful number, since it uses less digits than its factorization.

1625087772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21750 (or 21736 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 1625087772 is about 40312.3774044647. The cubic root of 1625087772 is about 1175.6885107970.

The spelling of 1625087772 in words is "one billion, six hundred twenty-five million, eighty-seven thousand, seven hundred seventy-two".