49401638 has 48 divisors (see below), whose sum is σ = 90091008. Its totient is φ = 20169600.

The previous prime is 49401629. The next prime is 49401647. The reversal of 49401638 is 83610494.

It is an interprime number because it is at equal distance from previous prime (49401629) and next prime (49401647).

It is a junction number, because it is equal to n+sod(n) for n = 49401598 and 49401607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128795 + ... + 129177.

It is an arithmetic number, because the mean of its divisors is an integer number (1876896).

Almost surely, 2^49401638 is an apocalyptic number.

49401638 is a deficient number, since it is larger than the sum of its proper divisors (40689370).

49401638 is a wasteful number, since it uses less digits than its factorization.

49401638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 49401638 is about 7028.6298807093. The cubic root of 49401638 is about 366.9276586273.

Subtracting 49401638 from its reverse (83610494), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 49401638 in words is "forty-nine million, four hundred one thousand, six hundred thirty-eight".