49017890 has 16 divisors (see below), whose sum is σ = 88466040. Its totient is φ = 19555200.

The previous prime is 49017889. The next prime is 49017901. The reversal of 49017890 is 9871094.

It can be written as a sum of positive squares in 4 ways, for example, as 29560969 + 19456921 = 5437^2 + 4411^2 .

It is a super-3 number, since 3×49017890³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411 + ... + 10190.

Almost surely, 2^49017890 is an apocalyptic number.

49017890 is a deficient number, since it is larger than the sum of its proper divisors (39448150).

49017890 is a wasteful number, since it uses less digits than its factorization.

49017890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12997.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 49017890 is about 7001.2777405271. The cubic root of 49017890 is about 365.9750995830.

The spelling of 49017890 in words is "forty-nine million, seventeen thousand, eight hundred ninety".