61810228 has 6 divisors (see below), whose sum is σ = 108167906. Its totient is φ = 30905112.

The previous prime is 61810219. The next prime is 61810237. The reversal of 61810228 is 82201816.

It is an interprime number because it is at equal distance from previous prime (61810219) and next prime (61810237).

It can be written as a sum of positive squares in only one way, i.e., 33315984 + 28494244 = 5772^2 + 5338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61810196 and 61810205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7726275 + ... + 7726282.

Almost surely, 2^61810228 is an apocalyptic number.

It is an amenable number.

61810228 is a deficient number, since it is larger than the sum of its proper divisors (46357678).

61810228 is a wasteful number, since it uses less digits than its factorization.

61810228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15452561 (or 15452559 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 61810228 is about 7861.9481046367. The cubic root of 61810228 is about 395.3849326663.

The spelling of 61810228 in words is "sixty-one million, eight hundred ten thousand, two hundred twenty-eight".