2628257238 has 12 divisors (see below), whose sum is σ = 5694557388. Its totient is φ = 876085740.

The previous prime is 2628257231. The next prime is 2628257243. The reversal of 2628257238 is 8327528262.

It is a happy number.

2628257238 is a `hidden beast` number, since 26 + 28 + 2 + 572 + 38 = 666.

It is a super-2 number, since 2×2628257238² = 13815472218198777288, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2628257193 and 2628257202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628257231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73007128 + ... + 73007163.

It is an arithmetic number, because the mean of its divisors is an integer number (474546449).

Almost surely, 2^2628257238 is an apocalyptic number.

2628257238 is an abundant number, since it is smaller than the sum of its proper divisors (3066300150).

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

2628257238 is a wasteful number, since it uses less digits than its factorization.

2628257238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146014299 (or 146014296 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 2628257238 is about 51266.5313630638. The cubic root of 2628257238 is about 1380.0324220486.

The spelling of 2628257238 in words is "two billion, six hundred twenty-eight million, two hundred fifty-seven thousand, two hundred thirty-eight".