55420470 has 192 divisors, whose sum is σ = 177292800. Its totient is φ = 12277440.

The previous prime is 55420451. The next prime is 55420471. The reversal of 55420470 is 7402455.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55420471) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 780535 + ... + 780605.

It is an arithmetic number, because the mean of its divisors is an integer number (923400).

Almost surely, 2^55420470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55420470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88646400).

55420470 is an abundant number, since it is smaller than the sum of its proper divisors (121872330).

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

55420470 is a wasteful number, since it uses less digits than its factorization.

55420470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 55420470 is about 7444.4925952008. The cubic root of 55420470 is about 381.2618944600.

The spelling of 55420470 in words is "fifty-five million, four hundred twenty thousand, four hundred seventy".