61390885 has 8 divisors (see below), whose sum is σ = 75382560. Its totient is φ = 47970384.

The previous prime is 61390873. The next prime is 61390891. The reversal of 61390885 is 58809316.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61390885 - 2¹¹ = 61388837 is a prime.

It is a super-2 number, since 2×61390885² = 7537681522166450, which contains 22 as substring.

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, 142555 + ... + 142984.

It is an arithmetic number, because the mean of its divisors is an integer number (9422820).

Almost surely, 2^61390885 is an apocalyptic number.

It is an amenable number.

61390885 is a deficient number, since it is larger than the sum of its proper divisors (13991675).

61390885 is a wasteful number, since it uses less digits than its factorization.

61390885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285587.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 61390885 is about 7835.2335638448. The cubic root of 61390885 is about 394.4887580241.

The spelling of 61390885 in words is "sixty-one million, three hundred ninety thousand, eight hundred eighty-five".