61178340 has 24 divisors (see below), whose sum is σ = 171299520. Its totient is φ = 16314208.

The previous prime is 61178329. The next prime is 61178389. The reversal of 61178340 is 4387116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 61178298 and 61178307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509760 + ... + 509879.

It is an arithmetic number, because the mean of its divisors is an integer number (7137480).

Almost surely, 2^61178340 is an apocalyptic number.

61178340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61178340 is an abundant number, since it is smaller than the sum of its proper divisors (110121180).

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

61178340 is a wasteful number, since it uses less digits than its factorization.

61178340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019651 (or 1019649 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 61178340 is about 7821.6583919269. The cubic root of 61178340 is about 394.0329706920.

The spelling of 61178340 in words is "sixty-one million, one hundred seventy-eight thousand, three hundred forty".