61690608 has 120 divisors (see below), whose sum is σ = 201500000. Its totient is φ = 17611776.

The previous prime is 61690591. The next prime is 61690613. The reversal of 61690608 is 80609616.

It is a super-3 number, since 3×61690608³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48768 + ... + 50016.

Almost surely, 2^61690608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61690608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100750000).

61690608 is an abundant number, since it is smaller than the sum of its proper divisors (139809392).

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

61690608 is a wasteful number, since it uses less digits than its factorization.

61690608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 61690608 is about 7854.3368911704. The cubic root of 61690608 is about 395.1297079767.

The spelling of 61690608 in words is "sixty-one million, six hundred ninety thousand, six hundred eight".