61311828 has 24 divisors (see below), whose sum is σ = 143291232. Its totient is φ = 20404384.

The previous prime is 61311823. The next prime is 61311863. The reversal of 61311828 is 82811316.

It is a junction number, because it is equal to n+sod(n) for n = 61311795 and 61311804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61311823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4351 + ... + 11897.

It is an arithmetic number, because the mean of its divisors is an integer number (5970468).

Almost surely, 2^61311828 is an apocalyptic number.

It is an amenable number.

61311828 is an abundant number, since it is smaller than the sum of its proper divisors (81979404).

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

61311828 is a wasteful number, since it uses less digits than its factorization.

61311828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8231 (or 8229 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 61311828 is about 7830.1869709478. The cubic root of 61311828 is about 394.3193490826.

The spelling of 61311828 in words is "sixty-one million, three hundred eleven thousand, eight hundred twenty-eight".