61789428 has 36 divisors (see below), whose sum is σ = 156432640. Its totient is φ = 20564496.

The previous prime is 61789393. The next prime is 61789439. The reversal of 61789428 is 82498716.

Added to its reverse (82498716) it gives a square (144288144 = 12012²).

61789428 is a `hidden beast` number, since 617 + 8 + 9 + 4 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38343 + ... + 39921.

Almost surely, 2^61789428 is an apocalyptic number.

It is an amenable number.

61789428 is an abundant number, since it is smaller than the sum of its proper divisors (94643212).

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

61789428 is a wasteful number, since it uses less digits than its factorization.

61789428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676 (or 2671 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 61789428 is about 7860.6251659776. The cubic root of 61789428 is about 395.3405768505.

Adding to 61789428 its reverse (82498716), we get a square (144288144 = 12012²).

The spelling of 61789428 in words is "sixty-one million, seven hundred eighty-nine thousand, four hundred twenty-eight".