61298878 has 4 divisors (see below), whose sum is σ = 91948320. Its totient is φ = 30649438.

The previous prime is 61298801. The next prime is 61298879. The reversal of 61298878 is 87889216.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61298879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15324718 + ... + 15324721.

It is an arithmetic number, because the mean of its divisors is an integer number (22987080).

Almost surely, 2^61298878 is an apocalyptic number.

61298878 is a deficient number, since it is larger than the sum of its proper divisors (30649442).

61298878 is a wasteful number, since it uses less digits than its factorization.

61298878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30649441.

The product of its digits is 387072, while the sum is 49.

The square root of 61298878 is about 7829.3599993869. The cubic root of 61298878 is about 394.2915850263.

The spelling of 61298878 in words is "sixty-one million, two hundred ninety-eight thousand, eight hundred seventy-eight".