47451420 has 120 divisors (see below), whose sum is σ = 157704624. Its totient is φ = 11902464.

The previous prime is 47451409. The next prime is 47451431. The reversal of 47451420 is 2415474.

It is an interprime number because it is at equal distance from previous prime (47451409) and next prime (47451431).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26679 + ... + 28401.

Almost surely, 2^47451420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47451420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78852312).

47451420 is an abundant number, since it is smaller than the sum of its proper divisors (110253204).

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

47451420 is a wasteful number, since it uses less digits than its factorization.

47451420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 47451420 is about 6888.4991108368. The cubic root of 47451420 is about 362.0343160086.

Adding to 47451420 its reverse (2415474), we get a palindrome (49866894).

The spelling of 47451420 in words is "forty-seven million, four hundred fifty-one thousand, four hundred twenty".