40156780 has 48 divisors (see below), whose sum is σ = 87736320. Its totient is φ = 15422400.

The previous prime is 40156777. The next prime is 40156783. The reversal of 40156780 is 8765104.

It is an interprime number because it is at equal distance from previous prime (40156777) and next prime (40156783).

It is a super-2 number, since 2×40156780² = 3225133959936800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (40156783) 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, 148045 + ... + 148315.

It is an arithmetic number, because the mean of its divisors is an integer number (1827840).

Almost surely, 2^40156780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40156780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43868160).

40156780 is an abundant number, since it is smaller than the sum of its proper divisors (47579540).

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

40156780 is a wasteful number, since it uses less digits than its factorization.

40156780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 40156780 is about 6336.9377462620. The cubic root of 40156780 is about 342.4414235520.

The spelling of 40156780 in words is "forty million, one hundred fifty-six thousand, seven hundred eighty".