61629390 has 32 divisors (see below), whose sum is σ = 164345760. Its totient is φ = 16434432.

The previous prime is 61629389. The next prime is 61629413. The reversal of 61629390 is 9392616.

61629390 is a `hidden beast` number, since 616 + 2 + 9 + 39 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113859 + ... + 114398.

It is an arithmetic number, because the mean of its divisors is an integer number (5135805).

Almost surely, 2^61629390 is an apocalyptic number.

61629390 is an abundant number, since it is smaller than the sum of its proper divisors (102716370).

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

61629390 is a wasteful number, since it uses less digits than its factorization.

61629390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228273 (or 228267 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 61629390 is about 7850.4388412368. The cubic root of 61629390 is about 394.9989638385.

The spelling of 61629390 in words is "sixty-one million, six hundred twenty-nine thousand, three hundred ninety".