49651440 has 80 divisors (see below), whose sum is σ = 154597248. Its totient is φ = 13182208.

The previous prime is 49651439. The next prime is 49651453. The reversal of 49651440 is 4415694.

It is a tau number, because it is divible by the number of its divisors (80).

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, 106087 + ... + 106553.

Almost surely, 2^49651440 is an apocalyptic number.

49651440 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 49651440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77298624).

49651440 is an abundant number, since it is smaller than the sum of its proper divisors (104945808).

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

49651440 is a wasteful number, since it uses less digits than its factorization.

49651440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 49651440 is about 7046.3777928805. The cubic root of 49651440 is about 367.5450821644.

The spelling of 49651440 in words is "forty-nine million, six hundred fifty-one thousand, four hundred forty".