61478220 has 48 divisors (see below), whose sum is σ = 173063520. Its totient is φ = 16306176.

The previous prime is 61478203. The next prime is 61478227. The reversal of 61478220 is 2287416.

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

It is not an unprimeable number, because it can be changed into a prime (61478227) 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, 8926 + ... + 14234.

It is an arithmetic number, because the mean of its divisors is an integer number (3605490).

Almost surely, 2^61478220 is an apocalyptic number.

61478220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61478220 is an abundant number, since it is smaller than the sum of its proper divisors (111585300).

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

61478220 is a wasteful number, since it uses less digits than its factorization.

61478220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514 (or 5512 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 61478220 is about 7840.8048056306. The cubic root of 61478220 is about 394.6757366560.

The spelling of 61478220 in words is "sixty-one million, four hundred seventy-eight thousand, two hundred twenty".