61728612 has 24 divisors (see below), whose sum is σ = 157127712. Its totient is φ = 18705600.

The previous prime is 61728577. The next prime is 61728613. The reversal of 61728612 is 21682716.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (61728613) 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, 233689 + ... + 233952.

It is an arithmetic number, because the mean of its divisors is an integer number (6546988).

Almost surely, 2^61728612 is an apocalyptic number.

It is an amenable number.

61728612 is an abundant number, since it is smaller than the sum of its proper divisors (95399100).

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

61728612 is a wasteful number, since it uses less digits than its factorization.

61728612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467659 (or 467657 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 61728612 is about 7856.7558190388. The cubic root of 61728612 is about 395.2108301408.

The spelling of 61728612 in words is "sixty-one million, seven hundred twenty-eight thousand, six hundred twelve".