61018428 has 12 divisors (see below), whose sum is σ = 142376360. Its totient is φ = 20339472.

The previous prime is 61018417. The next prime is 61018429. The reversal of 61018428 is 82481016.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×61018428³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61018395 and 61018404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61018429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542423 + ... + 2542446.

Almost surely, 2^61018428 is an apocalyptic number.

It is an amenable number.

61018428 is an abundant number, since it is smaller than the sum of its proper divisors (81357932).

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

61018428 is a wasteful number, since it uses less digits than its factorization.

61018428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084876 (or 5084874 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 61018428 is about 7811.4293186331. The cubic root of 61018428 is about 393.6893546307.

The spelling of 61018428 in words is "sixty-one million, eighteen thousand, four hundred twenty-eight".