61742730 has 32 divisors (see below), whose sum is σ = 169352064. Its totient is φ = 14112576.

The previous prime is 61742713. The next prime is 61742777. The reversal of 61742730 is 3724716.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146797 + ... + 147216.

It is an arithmetic number, because the mean of its divisors is an integer number (5292252).

Almost surely, 2^61742730 is an apocalyptic number.

61742730 is an abundant number, since it is smaller than the sum of its proper divisors (107609334).

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

61742730 is a wasteful number, since it uses less digits than its factorization.

61742730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294030.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 61742730 is about 7857.6542301122. The cubic root of 61742730 is about 395.2409575053.

The spelling of 61742730 in words is "sixty-one million, seven hundred forty-two thousand, seven hundred thirty".