51740490 has 16 divisors (see below), whose sum is σ = 124177248. Its totient is φ = 13797456.

The previous prime is 51740473. The next prime is 51740509. The reversal of 51740490 is 9404715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1724683 = 51740490 / (5 + 1 + 7 + 4 + 0 + 4 + 9 + 0).

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, 862312 + ... + 862371.

It is an arithmetic number, because the mean of its divisors is an integer number (7761078).

Almost surely, 2^51740490 is an apocalyptic number.

51740490 is an abundant number, since it is smaller than the sum of its proper divisors (72436758).

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

51740490 is a wasteful number, since it uses less digits than its factorization.

51740490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724693.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51740490 is about 7193.0862639065. The cubic root of 51740490 is about 372.6291671025.

The spelling of 51740490 in words is "fifty-one million, seven hundred forty thousand, four hundred ninety".