55770426 has 48 divisors (see below), whose sum is σ = 126247680. Its totient is φ = 17772480.

The previous prime is 55770419. The next prime is 55770427. The reversal of 55770426 is 62407755.

It is a super-2 number, since 2×55770426² = 6220680832442952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55770427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49101 + ... + 50223.

It is an arithmetic number, because the mean of its divisors is an integer number (2630160).

Almost surely, 2^55770426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55770426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63123840).

55770426 is an abundant number, since it is smaller than the sum of its proper divisors (70477254).

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

55770426 is a wasteful number, since it uses less digits than its factorization.

55770426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 55770426 is about 7467.9599623994. The cubic root of 55770426 is about 382.0627118518.

The spelling of 55770426 in words is "fifty-five million, seven hundred seventy thousand, four hundred twenty-six".