61363940 has 36 divisors (see below), whose sum is σ = 141649788. Its totient is φ = 22313280.

The previous prime is 61363933. The next prime is 61363943. The reversal of 61363940 is 4936316.

It is a happy number.

61363940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 40424164 = 4576^2 + 6358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61363897 and 61363906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61363943) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10259 + ... + 15098.

Almost surely, 2^61363940 is an apocalyptic number.

It is an amenable number.

61363940 is an abundant number, since it is smaller than the sum of its proper divisors (80285848).

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

61363940 is a wasteful number, since it uses less digits than its factorization.

61363940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25388 (or 25375 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 61363940 is about 7833.5138986281. The cubic root of 61363940 is about 394.4310347150.

The spelling of 61363940 in words is "sixty-one million, three hundred sixty-three thousand, nine hundred forty".