61288870 has 16 divisors (see below), whose sum is σ = 116126640. Its totient is φ = 23225184.

The previous prime is 61288841. The next prime is 61288879. The reversal of 61288870 is 7888216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61288879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161097 + ... + 161476.

It is an arithmetic number, because the mean of its divisors is an integer number (7257915).

Almost surely, 2^61288870 is an apocalyptic number.

61288870 is a deficient number, since it is larger than the sum of its proper divisors (54837770).

61288870 is a wasteful number, since it uses less digits than its factorization.

61288870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322599.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 61288870 is about 7828.7208405971. The cubic root of 61288870 is about 394.2701257702.

The spelling of 61288870 in words is "sixty-one million, two hundred eighty-eight thousand, eight hundred seventy".