49091840 has 72 divisors (see below), whose sum is σ = 134413440. Its totient is φ = 16828416.

The previous prime is 49091827. The next prime is 49091849. The reversal of 49091840 is 4819094.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 49091840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49091849) 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, 6221 + ... + 11699.

Almost surely, 2^49091840 is an apocalyptic number.

49091840 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 49091840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67206720).

49091840 is an abundant number, since it is smaller than the sum of its proper divisors (85321600).

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

49091840 is an equidigital number, since it uses as much as digits as its factorization.

49091840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507 (or 5493 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 49091840 is about 7006.5569290487. The cubic root of 49091840 is about 366.1590477986.

The spelling of 49091840 in words is "forty-nine million, ninety-one thousand, eight hundred forty".