2478765 has 16 divisors (see below), whose sum is σ = 3987648. Its totient is φ = 1314816.

The previous prime is 2478761. The next prime is 2478793. The reversal of 2478765 is 5678742.

It is not a de Polignac number, because 2478765 - 2² = 2478761 is a prime.

It is a super-2 number, since 2×2478765² = 12288551850450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 4⁹ + 7 + 8³ + 7⁶ + 6⁴ + 5 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478761) 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, 3534 + ... + 4176.

It is an arithmetic number, because the mean of its divisors is an integer number (249228).

2^2478765 is an apocalyptic number.

It is an amenable number.

2478765 is a deficient number, since it is larger than the sum of its proper divisors (1508883).

2478765 is a wasteful number, since it uses less digits than its factorization.

2478765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its digits is 94080, while the sum is 39.

The square root of 2478765 is about 1574.4094130816. The cubic root of 2478765 is about 135.3355166130.

The spelling of 2478765 in words is "two million, four hundred seventy-eight thousand, seven hundred sixty-five".