61199028 has 36 divisors (see below), whose sum is σ = 168762048. Its totient is φ = 18545040.

The previous prime is 61199023. The next prime is 61199063. The reversal of 61199028 is 82099116.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61198983 and 61199001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61199023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76876 + ... + 77667.

Almost surely, 2^61199028 is an apocalyptic number.

It is an amenable number.

61199028 is an abundant number, since it is smaller than the sum of its proper divisors (107563020).

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

61199028 is a wasteful number, since it uses less digits than its factorization.

61199028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154564 (or 154559 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 61199028 is about 7822.9807618324. The cubic root of 61199028 is about 394.0773809382.

The spelling of 61199028 in words is "sixty-one million, one hundred ninety-nine thousand, twenty-eight".