61628919 has 16 divisors (see below), whose sum is σ = 89777280. Its totient is φ = 37294560.

The previous prime is 61628873. The next prime is 61628929. The reversal of 61628919 is 91982616.

It is not a de Polignac number, because 61628919 - 2⁸ = 61628663 is a prime.

It is a super-2 number, since 2×61628919² = 7596247314217122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61628929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34404 + ... + 36150.

It is an arithmetic number, because the mean of its divisors is an integer number (5611080).

Almost surely, 2^61628919 is an apocalyptic number.

61628919 is a deficient number, since it is larger than the sum of its proper divisors (28148361).

61628919 is a wasteful number, since it uses less digits than its factorization.

61628919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830.

The product of its digits is 46656, while the sum is 42.

The square root of 61628919 is about 7850.4088428565. The cubic root of 61628919 is about 394.9979575817.

The spelling of 61628919 in words is "sixty-one million, six hundred twenty-eight thousand, nine hundred nineteen".