61229638 has 4 divisors (see below), whose sum is σ = 91844460. Its totient is φ = 30614818.

The previous prime is 61229627. The next prime is 61229659. The reversal of 61229638 is 83692216.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×61229638² = 7498137139222088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61229597 and 61229606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15307408 + ... + 15307411.

It is an arithmetic number, because the mean of its divisors is an integer number (22961115).

Almost surely, 2^61229638 is an apocalyptic number.

61229638 is a deficient number, since it is larger than the sum of its proper divisors (30614822).

61229638 is a wasteful number, since it uses less digits than its factorization.

61229638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30614821.

The product of its digits is 31104, while the sum is 37.

The square root of 61229638 is about 7824.9369326532. The cubic root of 61229638 is about 394.1430720580.

The spelling of 61229638 in words is "sixty-one million, two hundred twenty-nine thousand, six hundred thirty-eight".