2429778 has 16 divisors (see below), whose sum is σ = 5233536. Its totient is φ = 747600.

The previous prime is 2429773. The next prime is 2429809. The reversal of 2429778 is 8779242.

It is a super-2 number, since 2×2429778² = 11807642258568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2429771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15498 + ... + 15653.

It is an arithmetic number, because the mean of its divisors is an integer number (327096).

2^2429778 is an apocalyptic number.

2429778 is an abundant number, since it is smaller than the sum of its proper divisors (2803758).

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

2429778 is a wasteful number, since it uses less digits than its factorization.

2429778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31169.

The product of its digits is 56448, while the sum is 39.

The square root of 2429778 is about 1558.7745186524. The cubic root of 2429778 is about 134.4380481492.

The spelling of 2429778 in words is "two million, four hundred twenty-nine thousand, seven hundred seventy-eight".