61901428 has 12 divisors (see below), whose sum is σ = 112063140. Its totient is φ = 29883392.

The previous prime is 61901419. The next prime is 61901429. The reversal of 61901428 is 82410916.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15824484 + 46076944 = 3978^2 + 6788^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61901428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61901429) 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, 266701 + ... + 266932.

It is an arithmetic number, because the mean of its divisors is an integer number (9338595).

Almost surely, 2^61901428 is an apocalyptic number.

It is an amenable number.

61901428 is a deficient number, since it is larger than the sum of its proper divisors (50161712).

61901428 is a wasteful number, since it uses less digits than its factorization.

61901428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533666 (or 533664 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 61901428 is about 7867.7460558917. The cubic root of 61901428 is about 395.5792984785.

The spelling of 61901428 in words is "sixty-one million, nine hundred one thousand, four hundred twenty-eight".