51898040 has 16 divisors (see below), whose sum is σ = 116770680. Its totient is φ = 20759200.

The previous prime is 51898037. The next prime is 51898057. The reversal of 51898040 is 4089815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648686 + ... + 648765.

Almost surely, 2^51898040 is an apocalyptic number.

It is an amenable number.

51898040 is an abundant number, since it is smaller than the sum of its proper divisors (64872640).

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

51898040 is a wasteful number, since it uses less digits than its factorization.

51898040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297462 (or 1297458 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 51898040 is about 7204.0294280354. The cubic root of 51898040 is about 373.0070029616.

The spelling of 51898040 in words is "fifty-one million, eight hundred ninety-eight thousand, forty".