61235988 has 48 divisors (see below), whose sum is σ = 158832576. Its totient is φ = 18204160.

The previous prime is 61235987. The next prime is 61236011. The reversal of 61235988 is 88953216.

It is a super-2 number, since 2×61235988² = 7499692452672288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61235983) 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, 2620 + ... + 11372.

It is an arithmetic number, because the mean of its divisors is an integer number (3309012).

Almost surely, 2^61235988 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 61235988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79416288).

61235988 is an abundant number, since it is smaller than the sum of its proper divisors (97596588).

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

61235988 is a wasteful number, since it uses less digits than its factorization.

61235988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8824 (or 8822 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 61235988 is about 7825.3426762027. The cubic root of 61235988 is about 394.1566968432.

The spelling of 61235988 in words is "sixty-one million, two hundred thirty-five thousand, nine hundred eighty-eight".