49820439 has 4 divisors (see below), whose sum is σ = 66427256. Its totient is φ = 33213624.

The previous prime is 49820429. The next prime is 49820447. The reversal of 49820439 is 93402894.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 49820439 - 2¹⁵ = 49787671 is a prime.

It is a super-2 number, since 2×49820439² = 4964152284305442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49820397 and 49820406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49820429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8303404 + ... + 8303409.

It is an arithmetic number, because the mean of its divisors is an integer number (16606814).

Almost surely, 2^49820439 is an apocalyptic number.

49820439 is a deficient number, since it is larger than the sum of its proper divisors (16606817).

49820439 is a wasteful number, since it uses less digits than its factorization.

49820439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16606816.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 49820439 is about 7058.3595119546. The cubic root of 49820439 is about 367.9616153056.

The spelling of 49820439 in words is "forty-nine million, eight hundred twenty thousand, four hundred thirty-nine".