28077434 has 32 divisors (see below), whose sum is σ = 54798336. Its totient is φ = 10462320.

The previous prime is 28077433. The next prime is 28077463. The reversal of 28077434 is 43477082.

It is a junction number, because it is equal to n+sod(n) for n = 28077394 and 28077403.

It is not an unprimeable number, because it can be changed into a prime (28077431) 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, 422 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (1712448).

Almost surely, 2^28077434 is an apocalyptic number.

28077434 is a deficient number, since it is larger than the sum of its proper divisors (26720902).

28077434 is a wasteful number, since it uses less digits than its factorization.

28077434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 28077434 is about 5298.8143956927. The cubic root of 28077434 is about 303.9385624344.

The spelling of 28077434 in words is "twenty-eight million, seventy-seven thousand, four hundred thirty-four".