53420040 has 64 divisors (see below), whose sum is σ = 178070400. Its totient is φ = 14245056.

The previous prime is 53420033. The next prime is 53420047. The reversal of 53420040 is 4002435.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53420033) and next prime (53420047).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53419995 and 53420022.

It is not an unprimeable number, because it can be changed into a prime (53420047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23652 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (2782350).

Almost surely, 2^53420040 is an apocalyptic number.

It is an amenable number.

53420040 is an abundant number, since it is smaller than the sum of its proper divisors (124650360).

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

53420040 is a wasteful number, since it uses less digits than its factorization.

53420040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49483 (or 49473 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 53420040 is about 7308.9014222385. The cubic root of 53420040 is about 376.6182863523.

Adding to 53420040 its reverse (4002435), we get a palindrome (57422475).

The spelling of 53420040 in words is "fifty-three million, four hundred twenty thousand, forty".