61422780 has 48 divisors (see below), whose sum is σ = 177537024. Its totient is φ = 15850560.

The previous prime is 61422731. The next prime is 61422787. The reversal of 61422780 is 8722416.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61422787) 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, 14652 + ... + 18371.

It is an arithmetic number, because the mean of its divisors is an integer number (3698688).

Almost surely, 2^61422780 is an apocalyptic number.

61422780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61422780 is an abundant number, since it is smaller than the sum of its proper divisors (116114244).

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

61422780 is a wasteful number, since it uses less digits than its factorization.

61422780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33066 (or 33064 counting only the distinct ones).

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

The square root of 61422780 is about 7837.2686568728. The cubic root of 61422780 is about 394.5570637157.

The spelling of 61422780 in words is "sixty-one million, four hundred twenty-two thousand, seven hundred eighty".