245931138 has 48 divisors (see below), whose sum is σ = 549833856. Its totient is φ = 79405920.

The previous prime is 245931137. The next prime is 245931151. The reversal of 245931138 is 831139542.

245931138 is a `hidden beast` number, since 24 + 593 + 11 + 38 = 666.

It is not an unprimeable number, because it can be changed into a prime (245931131) 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, 71895 + ... + 75237.

It is an arithmetic number, because the mean of its divisors is an integer number (11454872).

Almost surely, 2^245931138 is an apocalyptic number.

245931138 is an abundant number, since it is smaller than the sum of its proper divisors (303902718).

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

245931138 is a wasteful number, since it uses less digits than its factorization.

245931138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479 (or 3476 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 245931138 is about 15682.1917473292. The cubic root of 245931138 is about 626.5241843842.

The spelling of 245931138 in words is "two hundred forty-five million, nine hundred thirty-one thousand, one hundred thirty-eight".