61828440 has 32 divisors (see below), whose sum is σ = 185485680. Its totient is φ = 16487552.

The previous prime is 61828423. The next prime is 61828447. The reversal of 61828440 is 4482816.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61828447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257499 + ... + 257738.

Almost surely, 2^61828440 is an apocalyptic number.

61828440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61828440 is an abundant number, since it is smaller than the sum of its proper divisors (123657240).

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

61828440 is a wasteful number, since it uses less digits than its factorization.

61828440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515251 (or 515247 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 61828440 is about 7863.1062564358. The cubic root of 61828440 is about 395.4237614250.

The spelling of 61828440 in words is "sixty-one million, eight hundred twenty-eight thousand, four hundred forty".