61240536 has 160 divisors (see below), whose sum is σ = 204906240. Its totient is φ = 16708032.

The previous prime is 61240453. The next prime is 61240537. The reversal of 61240536 is 63504216.

61240536 is a `hidden beast` number, since 6 + 124 + 0 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61240537) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104035 + ... + 104621.

It is an arithmetic number, because the mean of its divisors is an integer number (1280664).

Almost surely, 2^61240536 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 61240536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102453120).

61240536 is an abundant number, since it is smaller than the sum of its proper divisors (143665704).

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

61240536 is a wasteful number, since it uses less digits than its factorization.

61240536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61240536 is about 7825.6332651102. The cubic root of 61240536 is about 394.1664546144.

It can be divided in two parts, 61240 and 536, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61240536 in words is "sixty-one million, two hundred forty thousand, five hundred thirty-six".