61909420 has 12 divisors (see below), whose sum is σ = 130009824. Its totient is φ = 24763760.

The previous prime is 61909409. The next prime is 61909447. The reversal of 61909420 is 2490916.

It is a happy number.

61909420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×61909420³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1547716 + ... + 1547755.

It is an arithmetic number, because the mean of its divisors is an integer number (10834152).

Almost surely, 2^61909420 is an apocalyptic number.

It is an amenable number.

61909420 is an abundant number, since it is smaller than the sum of its proper divisors (68100404).

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

61909420 is a wasteful number, since it uses less digits than its factorization.

61909420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095480 (or 3095478 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 61909420 is about 7868.2539359123. The cubic root of 61909420 is about 395.5963219614.

The spelling of 61909420 in words is "sixty-one million, nine hundred nine thousand, four hundred twenty".