61338990 has 16 divisors (see below), whose sum is σ = 147213648. Its totient is φ = 16357056.

The previous prime is 61338983. The next prime is 61339001. The reversal of 61338990 is 9983316.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022287 + ... + 1022346.

It is an arithmetic number, because the mean of its divisors is an integer number (9200853).

Almost surely, 2^61338990 is an apocalyptic number.

61338990 is an abundant number, since it is smaller than the sum of its proper divisors (85874658).

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

61338990 is a wasteful number, since it uses less digits than its factorization.

61338990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044643.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 61338990 is about 7831.9212202371. The cubic root of 61338990 is about 394.3775701538.

The spelling of 61338990 in words is "sixty-one million, three hundred thirty-eight thousand, nine hundred ninety".