61726990 has 32 divisors (see below), whose sum is σ = 120032640. Its totient is φ = 22719744.

The previous prime is 61726967. The next prime is 61726999. The reversal of 61726990 is 9962716.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61726999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58891 + ... + 59929.

It is an arithmetic number, because the mean of its divisors is an integer number (3751020).

Almost surely, 2^61726990 is an apocalyptic number.

61726990 is a deficient number, since it is larger than the sum of its proper divisors (58305650).

61726990 is a wasteful number, since it uses less digits than its factorization.

61726990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 61726990 is about 7856.6525950942. The cubic root of 61726990 is about 395.2073685500.

The spelling of 61726990 in words is "sixty-one million, seven hundred twenty-six thousand, nine hundred ninety".