24729940 has 24 divisors (see below), whose sum is σ = 53609472. Its totient is φ = 9572640.

The previous prime is 24729919. The next prime is 24729973. The reversal of 24729940 is 4992742.

It is a super-2 number, since 2×24729940² = 1223139864807200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 24729940.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19324 + ... + 20563.

It is an arithmetic number, because the mean of its divisors is an integer number (2233728).

Almost surely, 2^24729940 is an apocalyptic number.

24729940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24729940 is an abundant number, since it is smaller than the sum of its proper divisors (28879532).

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

24729940 is a wasteful number, since it uses less digits than its factorization.

24729940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39927 (or 39925 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 24729940 is about 4972.9206709941. The cubic root of 24729940 is about 291.3450793852.

The spelling of 24729940 in words is "twenty-four million, seven hundred twenty-nine thousand, nine hundred forty".