3625428981 has 8 divisors (see below), whose sum is σ = 5044075200. Its totient is φ = 2311867712.

The previous prime is 3625428971. The next prime is 3625429009. The reversal of 3625428981 is 1898245263.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3625428981 - 2⁷ = 3625428853 is a prime.

It is a super-2 number, since 2×3625428981² = 26287470592549396722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3625428981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3625428901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26271156 + ... + 26271293.

It is an arithmetic number, because the mean of its divisors is an integer number (630509400).

Almost surely, 2^3625428981 is an apocalyptic number.

It is an amenable number.

3625428981 is a deficient number, since it is larger than the sum of its proper divisors (1418646219).

3625428981 is a wasteful number, since it uses less digits than its factorization.

3625428981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52542475.

The product of its digits is 829440, while the sum is 48.

The square root of 3625428981 is about 60211.5352818710. The cubic root of 3625428981 is about 1536.2190065697.

The spelling of 3625428981 in words is "three billion, six hundred twenty-five million, four hundred twenty-eight thousand, nine hundred eighty-one".