49247640 has 192 divisors, whose sum is σ = 182800800. Its totient is φ = 11390976.

The previous prime is 49247633. The next prime is 49247641. The reversal of 49247640 is 4674294.

49247640 is a `hidden beast` number, since 4 + 9 + 2 + 4 + 7 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 49247595 and 49247604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49247641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79251 + ... + 79869.

Almost surely, 2^49247640 is an apocalyptic number.

49247640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49247640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91400400).

49247640 is an abundant number, since it is smaller than the sum of its proper divisors (133553160).

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

49247640 is a wasteful number, since it uses less digits than its factorization.

49247640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 49247640 is about 7017.6662787568. Note that the first 3 decimals coincide. The cubic root of 49247640 is about 366.5459915098.

The spelling of 49247640 in words is "forty-nine million, two hundred forty-seven thousand, six hundred forty".