61394920 has 16 divisors (see below), whose sum is σ = 138138660. Its totient is φ = 24557952.

The previous prime is 61394897. The next prime is 61394933. The reversal of 61394920 is 2949316.

It can be written as a sum of positive squares in 2 ways, for example, as 60559524 + 835396 = 7782^2 + 914^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767397 + ... + 767476.

Almost surely, 2^61394920 is an apocalyptic number.

It is an amenable number.

61394920 is an abundant number, since it is smaller than the sum of its proper divisors (76743740).

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

61394920 is a wasteful number, since it uses less digits than its factorization.

61394920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534884 (or 1534880 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 61394920 is about 7835.4910503427. The cubic root of 61394920 is about 394.4974006060.

The spelling of 61394920 in words is "sixty-one million, three hundred ninety-four thousand, nine hundred twenty".